Individual Calculations February 2015
 Cohen, Lawrence S  Total change: 17.00  Rating chartPersonal card
 2015 Portsmouth Open Portsmouth, New Hampshire USA 2015-01-17
 2035 1920 2.00 3 0.85 20 17.00 
  Elmore, John P 1950 USA1.0010.542010.80 
  Yip, Carissa S 1851 USA1.0010.40208.00 
  Kelleher, William f2305 USA0.001-0.0920-1.80 

Rc - average rating of rated opponents, Ro - rating of a player in a tournament, Rp - rating performance of an unrated player, W - points won in a tournament against rated opponents, N - total number of games against rated opponents, Change - change used for calculation according to formula, K - development coefficient, Kchg - rating change of a player calculated as (K * change)


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